[PATCH] Fix PR gdb/290

[Joe Buck]

> Joe Buck <jbuck@synopsys.COM> writes:
> 
> |> For C89, I don't think it's legal though it may be reasonable to accept
> |> as an extension; I don't know about C99.
> 
> The C99 standard is quite clear about this:
> 
>     6.8.6.4[#1] A return statement with an expression shall not appear in
>     a function whose return type is void.  A return statement without an
>     expression shall only appear in a function whose return type is void.

OK, then this can only be done in C++.  Any C code should avoid it.

for 
void foo();
void bar() { return foo();}

(which is legal C++)

I've just checked, and gcc 2.95.2 and 3.0.3 reject this type of C code
iff -ansi -pedantic is specified.  By default they accept it.  Anyone
developing code that must compile with many compilers probably should
be using -pedantic.